A PRESENTATION ON

HOISTING EQUIPMENT- EARTH WORK EQUIPMENT

BY B.MAHESHBABU

CONTENTS :- HOISTING EQUIPMENT HOISTS-CRANES TRACTORS SCRAPERS DRAGLINES CLAM-SHELL BUCKETS

INTRO Hoisting is the lifting a weight from

one location and moving it to another location which is at a reasonable distance.

Big projects such as dams,industrial builindgs

Require hoisting equipment, which includes jacks,winches,chain hoists and cranes

HOISTING JACK

HOISTING WINCH MECHANISM

CRANES CRANE IS THE ONLY SINGLE MACHINE

WHICH IS SINGLE PIECE CAPABLE OF PROVIDING THREE DIMENSIONAL (360 degree) MOVEMENT OF WEIGHT IS CALLED A CRANE

TYPES STATIONARY OR DERRICK CRANES MOBILE CRANES OVERHEAD OR GANTRY CRANES TOWER CRANES

DERRICK CRANE

MAJOR PARTS

DERRICK CRANE CONSISTS OF MAJOR PARTS LIKE CRAWLER,MAST,SUPERSTRUCTURE,COUNTERWEIGHT,JIB,PULLEY

ELECTRICALLY OPERATED,DISEIL OPERATED, DIESIEL-ELECTRICAL OPERATED

THE BOOM CAN REVOLVE 360 Degrees THIS CRANE IS USED FOR HEAVY LOADS

UPTO 200 TONS

APPLICATIONS A DERRICK CRANES MAY BE USED ON A

WIDE RANGE OF WORKS INDUSTRIAL BUILDINGS CONSTRUCTION OF HIGH RISE

BUILDINGS ERECTION OF STEEL AND INDUSTRIAL

PLANTS HANDLING TIMBER HOISTING WORKS AT SHIP YARDS LOADING AND UNLOADING AT

SHIPYARDS CARGOS AT PORTS

MOBILE CRANES

CRAWLER TYPE MOBILE CRANE

TYPES CRAWLER TYRE TYPE ROUGH TERRAIN

THESE CRANES ARE MOUNTED ON MOBILE UNITS WHICH IS EITHER TYRE TYPE OR CRAWLER TYPE

TRUCK CRANES HAVE HIGH MOBILITY WHILE THE CRAWLER MOUNTED CRANES MOVE SLOWLY

CRAWLER MOUNTED CRANES ARE CAPABLE OF MOVING ON ROUGH TERRAIN

APPLICATIONS WHEEL TYPER CRANES USED FOR

LIFTING LOW LOAD CAPCITY MATERIALS USED TO LIFT THE CONCRETE GIRDERS,

LIGHT STEEL AND WOOD MATERIALS WORKING AND LIFTING MATERIALS AT

DEEP VALLY AND HIGH RISE BUILIDINGS LIFTING VEHICLES AT ACCIDENT AREAS

AND CLEARING THE VECHILCES IN JAMMED AREAS

LIFTING LIGHT WEIGHT SLEEPERS IN RAILWAYS

CRAWLER TYPE USED AT ROUGH AND WET TERRAINS FOR THE SAME PURPOSES ABOVE

GANTRY CRANES

PARTS :-

THESE TYPE CRANES CONSITS OF TWO MAJOR PARTS : BRIDGE AND CRAB

THE BRIDGE CONSISTS OF TWO MAIN GIRDERS AT THEIR END TO END AND CAPABLE OF MOVING ON GANTRY RAILS

THE CRAB CONSISTS OF THE HOISTING GEAR MOUNTED ON FRAME

FREE OF MOVING IN ANY DIRECTION NO OBSTACLES IN LIFTING LIMITED TO CERTAIN HEIGHT

APPLICATIONS THESE CRANES ARE USED FOR

HANDLING LOADS OVER A LONG RECATANGULAR AREA SUCH AS IN FACORIES AND WORKSHOPS TO MOVE MACHINES AND OTHER LOADS IN ANY DIRECTION

THESE CRANES CONSIST OF HOISTING MECHANISM MOUNTED ON A CARRIAGE

CAPICITY 0.99 TO 455 Metric tonnes LARGE SEVICE AREA FREEDOM FROM FLOOR AREA

WIDLEY USED IN ERECTION ,FOUNDRY, STEEL PLANTS, STORAGE YARDS

TOWER CRANES

IN APPEARNCE MOST OF TOWER CRANES LOOK ALIKE BUT THEY ARE NOT SAME TYPE

VARIOUS TYPES OF TOWER CRANES ARE AVAILABLE IN THE MARKET AND IT IS IMPORTANT TO CHOOSE THE RIGHT TOWER CRANE FOR A PROJECT.

THE TOWER CRANES HAVE MORE ADAVANTAGES THAN CONVENTIONAL CRANES

THE LIFTING CAPACITY IS ONE OF THE IMPORTANT SLECTION PARAMETER BESIDES LENGTH OF RADIUS,MAXIMUM HOOK HEIGHT ABVOVE GROUND

APPLICATIONS THE USE OF TOWER CRANE HAS

BECOME PROMINENT WITH MEDIUM TO HIGH RISE CONSTRUCTIONS

BRIDGES ,DAMS, TOWERS(COMMUNICATION)

TOWER CRANES CAN BE FIXED ON RAILS ONLY

EXCELLENT BEARING OF LOAD AND ITS SURROUNDINGS AT ALL TIMES

TRACTORS MULTI-PURPOSE MACHINES USED

MAINLY PULLING AND PUSHING OTHER EQUIPMENTS

TRACTORS MAYBLE CLASSIFED INTO TWO

CRAWLER TYPE WHEEL TYPE

TYPES CRAWLER TYPE : USED TO MOVE

BULLDOZERS,SCRAPERS

THE CRAWLER HAS A CHAIN BY WHICH THESE TRACTORS CAN BE VERY EFFECTIVE EVEN IN THE CASE OF LOOSE OR MUDDY SOILS. THE SPEED OF THIS TYPE DOSE NOT EXCEED 12 KMPH NORMALLY.

WHEEL TYPE :THE ENGINE IS MOUNTED ON FOUR WHEELS. THE MAIN ADVANTAGE IS HIGHER SPEED, SOMETIMES EXCEEDING 50 KMPH IT IS USED FOR LONG-DISTANCE HAULING AND GOOD ROADS

COMPARISION

CRAWLER TYPE

WHEEL TYPE

SCRAPERS

SCRAPERS UNIQUE MACHINE FOR DIGGING AND LONG-

DISTANCE HAULING OF PLOUGH ABLE MATERIALS.

SELF-OPERATING MACHINE A WHEEL TRACTOR-SCRAPER IS A PIECE

OF HEAVY EQUIPMENT USED FOR EARTHMOVING

 IT IS NOT DEPENDENT ON OTHER EQUIPMENT. WHEELS OF MACHINE CAUSE SOME

COMPACTION THE BASIC PARTS OF SCRAPERS ARE THE

BOWL, APRON AND TAIL GATE OR EJECTOR

APPLICATION USED FOR EARTH MOVING TRIMMING THE SMALL EARTH CUTTINGS GRADING AND SMALL COMPACTION FOR

LARGE HAULS

DRAGLINES

THE DRAG LINE IS SO NAME BECAUSE OF ITS PROMINENT OPERATION OF DRAGGING THE BUCKET AGAINST THE MATERIAL TO BE DUG

 UNLIKE THE SHOVEL, IT HAS A LONG LIGHT CRANE BOOM AND THE BUCKET IS LOOSELY ATTACHED TO THE BOOM THROUGH CABLES

BECAUSE OF THIS CONSTRUCTION, A DRAGLINE CAN DIG AND DUMP OVER LARGER DISTANCES THAN A SHOVEL CAN DO

 DRAG LINES ARE USEFUL FOR DIGGING BELOW ITS TRACK LEVEL AND HANDLING SOFTER MATERIALS.

THE BASIC PARTS OF A DRAG LINE INCLUDING THE BOOM, HOIST CABLE, DRAG CABLE, HOIST CHAIN, DRAG CHAIN AND BUCKET.

APPLICATION IT IS THE MOST SUITABLE MACHINE FOR

DRAGGING SOFTER MATERIAL AND BELOW ITS TRACK LEVEL

 IT IS VERY USEFUL FOR EXCAVATING TRENCHES WHEN THE SIDES ARE PERMITTED TO ESTABLISH THEIR ANGLE OF REPOSE WITHOUT SHORING

IT IS MOSTLY USED IN THE EXCAVATION FOR CANALS AND DEPOSITING ON THE EMBANKMENT WITHOUT HAULING UNITS

CLAM SHELL BUCKET

THIS IS SO NAMED DUE TO RESEMBLANCE OF ITS BUCKET TO A CLAM WHICH IS LIKE A SHELL-FISH WITH HINGED DOUBLE SHELL

THE FRONT END IS ESSENTIALLY A CRANE BOOM WITH A SPECIALLY DESIGNED BUCKET LOOSELY ATTACHED AT THE END THROUGH CABLES AS IN A DRAG LINE.

THE CAPACITY OF A CLAM SHELL BUCKET IS USUALLY GIVEN IN CUBIC METERS

THE BASIC PARTS OF CLAM SHELL BUCKET ARE THE CLOSING LINE, HOIST LINE, SHEAVES, BRACKETS, TAGLINE, SHELL AND HINGE.

USED FOR HANDLING LOOSE MATERIAL SUCH AS CRUSHED STONE, SAND, GRAVEL, COAL ETC.

MAIN FEATURE IS VERTICAL LIFTING OF MATERIAL FROM ONE LOCATION TO ANOTHER.

MAIN FEATURE IS VERTICAL LIFTING OF MATERIAL FROM ONE LOCATION TO ANOTHER.

THANK YOU